聚(二甲基硅氧烷-co-甲氧基十二烷基硅氧烷)在棉纤维及其模型表面的膜形貌及定向排列方式

用场发射扫描电镜(FESEM)、原子力显微镜(AFM)、光电子能谱(XPS)等仪器研究了棉纤维以及再生纤维素表面聚(二甲基硅氧烷-co-甲氧基十二烷基硅氧烷)(DDPS)的膜形貌及其定向排列方式.结果发现,在天然棉纤维以及再生纤维素模型表面,DDPS均能形成宏观上平滑、而微观形态学实则非均一的疏水性硅膜,表明DDPS的定向排列成膜方式为疏水性硅甲基、硅十二烷基朝外伸向空气,硅氧偶极键指向基质界面.

FILM MORPHOLOGY AND ORIENTATION OF POLY(DIMETHYLSILOXANE-co-METHOXYDODECYLSILOXANE) ON COTTON FIBER AND ITS CELLULOSE MODEL SUBSTRATES

Film morphology and orientation of poly(dimethylsiloxane-co-methoxydodecylsiloxane)(DDPS) on different cellulose models,such as natural cotton fiber and the regenerated cellulose substrates,were investigated and studied by atomic force microscope(AFM),field emission scanning electronic microscope(FESEM),X-ray photoelectron spectroscope(XPS) and other instruments.Experimental results showed that DDPS formed hydrophobic,macroscopic smooth but actually microscopic inhomogeneous structural films on these cellulose model substrates.The hydrophobic property and characteristic AFM morphology demonstrated that DDPS molecules took such an orientation in forming films on cellulose models so that the Si—CH_3 and Si—C_(12)H_(25) groups pointed outward to the film surface,while the dipolar Si—O bonds pointed to the interface with the cellulose model substrates.